Mostly electricity will be used for powering all of the devices and everything else. Obviously, food, water and air is needed for all of the employees.
As for production, its just that a large amount of devices will be required. These projects wouldn’t cause so much damage in terms of pollution as there really is nothing for us to discard and enter the landfill. On rare occasions there could be burned up devices, but that should not be occuring any once in a while.